gridrenderer.cpp

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/***************************************************************************
 *   Copyright (C) 2005-2019 by the FIFE team                              *
 *   http://www.fifengine.net                                              *
 *   This file is part of FIFE.                                            *
 *                                                                         *
 *   FIFE is free software; you can redistribute it and/or                 *
 *   modify it under the terms of the GNU Lesser General Public            *
 *   License as published by the Free Software Foundation; either          *
 *   version 2.1 of the License, or (at your option) any later version.    *
 *                                                                         *
 *   This library is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
 *   Lesser General Public License for more details.                       *
 *                                                                         *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this library; if not, write to the                 *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
 ***************************************************************************/

// Standard C++ library includes

// 3rd party library includes

// FIFE includes
// These includes are split up in two parts, separated by one empty line
// First block: files included from the FIFE root src directory
// Second block: files included from the same folder
#include "video/renderbackend.h"
#include "util/math/fife_math.h"
#include "util/log/logger.h"
#include "model/metamodel/grids/cellgrid.h"
#include "model/structures/instance.h"
#include "model/structures/layer.h"
#include "model/structures/location.h"

#include "view/camera.h"
#include "gridrenderer.h"


namespace FIFE {
    static Logger _log(LM_VIEWVIEW);

    GridRenderer::GridRenderer(RenderBackend* renderbackend, int32_t position):
        RendererBase(renderbackend, position) {
        setEnabled(false);
        m_color.r = 0;
        m_color.g = 255;
        m_color.b = 0;
    }

    GridRenderer::GridRenderer(const GridRenderer& old):
        RendererBase(old),
        m_color(old.m_color) {
        setEnabled(false);
    }

    RendererBase* GridRenderer::clone() {
        return new GridRenderer(*this);
    }

    GridRenderer::~GridRenderer() {
    }

    GridRenderer* GridRenderer::getInstance(IRendererContainer* cnt) {
        return dynamic_cast<GridRenderer*>(cnt->getRenderer("GridRenderer"));
    }

    void GridRenderer::render(Camera* cam, Layer* layer, RenderList& instances) {
        CellGrid* cg = layer->getCellGrid();
        if (!cg) {
            FL_WARN(_log, "No cellgrid assigned to layer, cannot draw grid");
            return;
        }

//
//      //render elev_coord box
//      //draw front quad
//      // 1,1,1
//      //1,-1,1
//      //-1,-1,1
//      //-1,1,1
        //We don't need the elevation box atm
//      Point a,b,c,d;
//
//
//      ScreenPoint copt1 =cam->toScreenCoordinates(ExactModelCoordinate(1,1,1) );
//      ScreenPoint copt2 =cam->toScreenCoordinates(ExactModelCoordinate(1,-1,1) );
//      Point coptt1(copt1.x,copt1.y);
//      Point coptt2(copt2.x,copt2.y);
//      m_renderbackend->drawLine(coptt1,coptt2 ,15, 15, 200);
//      a = coptt1;
//
//      copt1 =cam->toScreenCoordinates(ExactModelCoordinate(1,-1,1) );
//      copt2 =cam->toScreenCoordinates(ExactModelCoordinate(-1,-1,1) );
//      coptt1 = Point(copt1.x,copt1.y);
//      coptt2 = Point(copt2.x,copt2.y);
//      m_renderbackend->drawLine(coptt1,coptt2 ,15, 15, 200);
//      b = coptt1;
//
//      copt1 =cam->toScreenCoordinates(ExactModelCoordinate(-1,-1,1) );
//      copt2 =cam->toScreenCoordinates(ExactModelCoordinate(-1,1,1) );
//      coptt1 = Point(copt1.x,copt1.y);
//      coptt2 = Point(copt2.x,copt2.y);
//      m_renderbackend->drawLine(coptt1,coptt2 ,15, 15, 200);
//      c = coptt1;
//
//      copt1 =cam->toScreenCoordinates(ExactModelCoordinate(-1,1,1) );
//      copt2 =cam->toScreenCoordinates(ExactModelCoordinate(1,1,1) );
//      coptt1 = Point(copt1.x,copt1.y);
//      coptt2 = Point(copt2.x,copt2.y);
//      m_renderbackend->drawLine(coptt1,coptt2 ,15, 15, 20);
//      d = coptt1;
//
//      m_renderbackend->drawQuad(a,b,c,d,15, 15, 200);
//
//
//      //draw back quad
//      copt1 =cam->toScreenCoordinates(ExactModelCoordinate(-1,-1,-1) );
//      copt2 =cam->toScreenCoordinates(ExactModelCoordinate(-1,1,-1) );
//      coptt1 = Point(copt1.x,copt1.y);
//      coptt2 = Point(copt2.x,copt2.y);
//      m_renderbackend->drawLine(coptt1,coptt2 ,200, 200, 200);
//
//      copt1 =cam->toScreenCoordinates(ExactModelCoordinate(-1,1,-1) );
//      copt2 =cam->toScreenCoordinates(ExactModelCoordinate(1,1,-1) );
//      coptt1 = Point(copt1.x,copt1.y);
//      coptt2 = Point(copt2.x,copt2.y);
//      m_renderbackend->drawLine(coptt1,coptt2 ,200, 200, 200);
//
//      copt1 =cam->toScreenCoordinates(ExactModelCoordinate(1,1,-1) );
//      copt2 =cam->toScreenCoordinates(ExactModelCoordinate(1,-1,-1) );
//      coptt1 = Point(copt1.x,copt1.y);
//      coptt2 = Point(copt2.x,copt2.y);
//      m_renderbackend->drawLine(coptt1,coptt2 ,200, 200, 200);
//
//      copt1 =cam->toScreenCoordinates(ExactModelCoordinate(1,-1,-1) );
//      copt2 =cam->toScreenCoordinates(ExactModelCoordinate(-1,-1,-1) );
//      coptt1 = Point(copt1.x,copt1.y);
//      coptt2 = Point(copt2.x,copt2.y);
//      m_renderbackend->drawLine(coptt1,coptt2 ,200, 200, 200);


        // make the viewport 25% larger
        Rect cv = cam->getViewPort();
        int32_t cvx2 = round((cv.x+cv.w) * 1.25);
        int32_t cvy2 = round((cv.y+cv.h) * 1.25);
        cv.x -= round((cv.x+cv.w) * 0.125);
        cv.y -= round((cv.y+cv.h) * 0.125);
        RenderList::const_iterator instance_it = instances.begin();
        for (;instance_it != instances.end(); ++instance_it) {
            Instance* instance = (*instance_it)->instance;
            std::vector<ExactModelCoordinate> vertices;
            cg->getVertices(vertices, instance->getLocationRef().getLayerCoordinates());
            std::vector<ExactModelCoordinate>::const_iterator it = vertices.begin();
            ScreenPoint firstpt = cam->toScreenCoordinates(cg->toMapCoordinates(*it));
            Point pt1(firstpt.x, firstpt.y);
            Point pt2;
            ++it;
            for (; it != vertices.end(); it++) {
                ScreenPoint pts = cam->toScreenCoordinates(cg->toMapCoordinates(*it));
                pt2.x = pts.x;
                pt2.y = pts.y;
                Point cpt1 = pt1;
                Point cpt2 = pt2;

                if (cpt1.x < cv.x) cpt1.x = cv.x;
                if (cpt2.x < cv.x) cpt2.x = cv.x;
                if (cpt1.y < cv.y) cpt1.y = cv.y;
                if (cpt2.y < cv.y) cpt2.y = cv.y;
                if (cpt1.x > cvx2) cpt1.x = cvx2;
                if (cpt2.x > cvx2) cpt2.x = cvx2;
                if (cpt1.y > cvy2) cpt1.y = cvy2;
                if (cpt2.y > cvy2) cpt2.y = cvy2;

                m_renderbackend->drawLine(cpt1, cpt2, m_color.r, m_color.g, m_color.b);
                pt1 = pt2;
            }
            if ((pt2.x >= cv.x) && (pt2.x <= cvx2) && (pt2.y >= cv.y) && (pt2.y <= cvy2)) {
                if ((firstpt.x >= cv.x) && (firstpt.x <= cvx2) && (firstpt.y >= cv.y) && (firstpt.y <= cvy2)) {
                    m_renderbackend->drawLine(pt2, Point(firstpt.x, firstpt.y), m_color.r, m_color.g, m_color.b);
                }
            }
        }
    }

    void GridRenderer::setColor(Uint8 r, Uint8 g, Uint8 b) {
        m_color.r = r;
        m_color.g = g;
        m_color.b = b;
    }
}